At Beltane cattle were often herded between two fires to cleanse them. It’s also believed the heat killed off the insects, and that the cattle were blessed by the process.
One way we could take advantage of this custom ourselves is to do a meditation asking a particular God or Goddess to safely surround and suffuse you with Their flames. You can ask for help to cleanse any negativity or release any ties that you need to let go of. Deities aren’t limited to the way Their energies and healing can work, but they may have a particular speciality you can call upon.